Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b56b15177383cac…

MALICIOUS

PDF

70.3 KB Created: 2021-06-11 06:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f836e99253fcf332ab805d9d711d0fef SHA-1: 15a86b71edc6c6f7058fd27f66e437e7e04f4b3a SHA-256: 0b56b15177383cac3b7e2f4347650cfe960b29a49dd53610484e182d0f121bf9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cructi.ru/uplcv?utm_term=spirit+of+praise+songs+2019 PDF link annotation
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a47142b5---39474912988.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/m59ldsaek0mt49vchfq2bri4to/pisegokitivirebotofo.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/6eaac716d8176e4be682b52c795bd8c0/lopusageriki.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d39558c1ee---wodafovuxinax.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/43592cc220d14e832f9af3c9ebb16407/navemezajezidop.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/81988c5271c1b3ed8ee047196c74abdb/10350465788.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/e09b5dcadc3847b0bc4e1d3a80c80d86/kuxovuval.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/38614370463.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/metexujigobikaboranofuja.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/7492253839.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/xelatororuzaduwod.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081f0be89caf---63633817029.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/elvg0dadvr95dqso303g6d0th2/pojajebixawo.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/i5d05ncs3qs5jvnbihsij9fhi5/rigab.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/3n0p9e82k80a9bsph753t6llj6/sataseta.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd7c68364---noduv.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af907104292---78606041489.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 5624 bytes
SHA-256: a7d7aff4b9d95576a607026a319630ea58bec710980b51ef8dd2316fa6e0a324

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